Aircraft of the US Air Force air demonstration squadron, the Thunderbirds, fly over Kogalniceanu airport, near Constanta.. The United States and Romania are negotiating the purchase of second-hand F-16 combat aircraft.

REUTERS/Bogdan Cristel

Dancers from Grupo Corpo of Brazil perform during the V International Ballet Festival in Cali. Dance groups from 10 different countries will take part in the festival which runs till June 11.

REUTERS

Horses walk the racetrack during a morning training session in preparation for The Belmont Stakes at Belmont Park in New York.

Al Bello/Getty Images

Members of the Yemeni security forces take up positions inside the Ministry of Industry and Trade, during clashes with tribesmen, loyal to Sheik Sadeq al-Ahmar, the head of the powerful Hashid tribe, in Sanaa, Yemen.

AP Photo

Firefighters work at the scene of the former Alice Mills Rubber Manufacturing Plant which burns in Woonsocket, R.I.. The massive, eight-alarm fire at the historic mill forced evacuations and left hundreds without power.

AP Photo

President Obama toasts German Chancellor Angela Merkel during a State Dinner in the Rose Garden at the White House in Washington DC.

AFP/Getty Images

Smoke from the Wallow Fire moves across the sky near Greer, Ariz. Officials say the blaze has already burned 486 square miles and is about 10 miles outside the towns. Winds have been driving the flames 5 to 8 miles a day since the fire began a week ago, possibly from an unattended campfire.

AP Photo

A member of the media walks along a road covered with ash from Chile's Puyehue-Cordon Caulle volcano chain near the Cardenal Samore border pass between Argentina and Chile. The volcano, dormant for decades, erupted in south-central Chile on Saturday, belching ash over six miles into the sky, as winds fanned it toward neighboring Argentina, and prompted the government to evacuate several thousand residents.

REUTERS

Children practice during a ballet class at the Croatian National Theatre in Adriatic port of Split, Croatia.

REUTERS

A smoke bomb explodes near a South Korean army K-1 tank during a South Korea and U.S. joint military exercise against possible North Korean attacks in Paju near the demilitarized zone (DMZ) between the two Koreas. North Korea conducted a routine short-range missile test last week in an apparent effort to improve its missile capabilities, a South Korean officials said amid renewed tension on the Korean peninsula.

AP

An employee of a foreign exchange trading company walks past the rate of the Japanese yen against the dollar in Tokyo. The dollar slipped to a one-month low against the yen on Wednesday and stayed under broad selling pressure across the board on the view that a slow U.S. economic recovery will keep interest rates low well into next year.

REUTERS

Brazil's retired striker Ronaldo gestures during his farewell match with the Brazilian team in a friendly soccer game with Romania in Sao Paulo, Brazil.

NELSON ALMEIDA/AFP/Getty Images

Two men look for scrap iron from the ruins of a building damaged by a 1972 earthquake, in the old centre of Managua. The iron will be sold to recycling companies.

REUTERS

The White House host a State Dinner performance by members of the National Symphony Orchestra in the Rose Garden in honor of German Chancellor Angela Merkel.

AP Photo

A coronal mass ejection, viewed by the Solar Dynamics Observatory. A medium-sized solar flare has erupted from the sun in an impressive display captured by NASA cameras. Scientists say that the event won't have a significant impact on Earth. NASA says the flare peaked Tuesday and created a large cloud that appeared to cover almost half the surface of the sun. Images were recorded by the orbiting satellite called the Solar Dynamics Observatory.

AP

Pre-cut vegetables of a self service salad bar are displayed for sale in a shop in the northern German town of Hamburg. The deadliest outbreak of its type on record has so far killed 23 people -- 22 in Germany and one in Sweden. Striking suddenly in the middle of a hot and sunny May, the crisis has doctors struggling to explain the outbreak and public health authorities in one of Europe's most famously organised countries stumped as to how to manage it and how to stop it happening again.

REUTERS

The International Space Station and the docked space shuttle Endeavour, flying at an altitude of approximately 220 miles, was taken by Expedition 27 crew member Paolo Nespoli from the Soyuz TMA-20 following its undocking.

AFP/Getty Images

Body piercer Bill "Danger" Robinson and sideshow performer Staysha Randall call it quits at 3,200 body piercings, after breaking the Guinness Book record for "Most Body Piercings in a Single Sitting", at Inktoxicated Tattoos in Las Vegas, Nevada. The previous record was 3,100 piercings. The record is awaiting verification by Guinness to be official.